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In Reply to: RE: Etched Code posted by Mechans on August 09, 2016 at 21:30:22
Kind of interesting experiment video illustrating what hyrdofluoric acid can do.
Edits: 08/11/16Follow Ups:
For informing me about Hydroflouric acid. I took two semesters of College chemistry and thought like the professor, that glass was "our Friend" and never came across or forgot about this acid. It appears to be a very dangerous and difficult chemical to work with, especially in an industry that was turning out ?hundreds of tubes per minute" or whatever number it was. I noted that the same guy has another video about hydrofluoric acid available on Youtube with approx. 1.7 million hits, with a title The Flesh Eating Acid! I think the only acid we used in the Chemistry lab that was a strong and dangerous acid was X Molar Sulfuric Acid.
Well then Acid Etch it is!
Proper precautions allow the hazardous substance to be safely employed.
While they are targeted for elimination, incandescent light bulbs are still being made. Those that are "frosted" use an envelope that was etched, on the inside, with hydrofluoric acid.
Eli D.
favorite light bulbs. I guess it makes sense that an electron tube user/lover would also favor that kind of light bulb.
When the highly energy efficient bulb policy was first implemented, stores in my area, no longer carried the old incandescent bulbs, much to my consternation. Fortunately the did start to carry them again, and they seem to be everywhere.
Now if we can get Philips to go back to Hicksville.....
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